Terminal in digital trunking communication system and method for realizing fast answer thereof

1. A method for fast answering a trunking call in a digital trunking communication system, comprising: establishing, by a main control device of the terminal, a service channel after receiving a channel assignment message signalling from a system side; determining, by the main control device, whether a call from the system side is a trunking call or not; sending, by the main control device, directly a service interface display message to a control chip of the terminal when determining that the call is a trunking call; and displaying, by the control chip, a service interface according to the service interface display message, answering the call, and playing voice messages sent by the system side.

2. The method of claim 1 , wherein the main control device determines whether a call from the system side is a trunking call or not according to contents of an assignment mode field in the channel assignment message signalling.

3. The method of claim 1 , wherein the terminal is a mobile phone or a vehicle mounted radio station.

4. A terminal in a digital trunking communication system, comprising a main control device and a control chip, wherein: the main control device is configured to: establish a service channel after receiving a channel assignment message signalling from a system side; determine whether a call from the system side is a trunking call or not; and send directly a service interface display message to the control chip of the terminal when determining that the call is a trunking call; and the control chip is configured to display a service interface according to the service interface display message, answer the call, and play voice messages sent by the system side.

5. The terminal of claim 4 , wherein the terminal is a mobile phone or a vehicle mounted radio station.

6. The method of claim 2 , wherein the terminal is a mobile phone or a vehicle mounted radio station.